Machine rock-drill.



T. A. SONE.

MACHINE ROCK DRILL.

APPLICATION FILED SEPT. 10, um.

Patented Nov. 24, 19%

nrrnn sa'rns earner orator).

THOMAS ALBERT SONE, OF PRESTON, VICTORIA, AUSTRALIA,.

MACHINE ROCK-DRILL Specification of Letters Patent Patented Nov. 24,1914.

Application filed September 10, 1913. Serial No. 789,118.

To all whom it may concern:

Be it known that LlTirolvms ALBERT Some,

a subject of the King of Great Britain and Ireland, 620., residing at Preston, in the State of Victoria, Commonwealth of :Aus-

tralia, have invented certain new and useful Improvements 1 in Machine Rock-Drills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. i

This invention relates to improvements in machine rock drills, especially for drilling holesfor the purpose of blasting, and is of minute or a rate suited to the cams used.

Reference will be had to the accompanyingdrawings in which likereference characters designate like parts throughout the several views; 1

Figure 1 represents a sectional elevation of my invention with parts broken away, and a diagrammatic showing of the outer casing, withthe striking rod fully extended, Fig.2 is a sectional elevation wlth parts 1 broken away of the internal slide case with the striking rod at the beginning oi the out wardstroke. Fig. 3. is a sectional plan view with parts broken away showing a portion of the concussion spring, and a hand wheel diagrammatically. Fig.4: is across section onthe line a in Fig. 1 with parts broken away. Fig. 5 is an elevationof the feed end of the casing showing the feed screw in cross section. Fig. 6 is a cross section along the line b in Fig. 1, with a diagram matic showing of the outer case, and Fig. 7 shows a supplementary cam adjustable shoe fitted in place on the supplementary cam arm. a

The drill striking rod 1 is mounted to work in part within a frame 2 which is slidably adjustable in an outer skeleton casing 30. This skeleton casing is square at its ends and is inclosed at a suitable portionof its length by a square frame 10, which is made to pinch or grip said casing by means,hereinat'tcr more fully described. The rod 1 ,re-

ciprocates through a number of bushings 3 set inthe casing in rectilinear alinement.

: A wiping collar l is mounted on rod 1 and is provided with a boss 10 which is keyed or otherwise held in the desired adjustment.

The rod 1 is given an intermittent reciprocating motion, by means of the repeated lifting and liberating action of the respective oppositely sot cams. on the collar 8. These cams are secured to and rotated bya: V

shaft (see Fig.3) having squared or angular ends 9. The Sl'litlllZlS also provlded with locknuts 8 or other suitable means for securing in position the carrying sleeve for the main cam arms 6. On the same shaft is another carrying sleeve for the supplemem tary arms 7 (shown 1n detall 1n F g l the outer ends oi: which have short cam surfaces,

and act on the collar 4; simultaneouslyand equally with the cams 6, having longer cam surfaces. In the construction of the sup-1 plemental cams 7 a hollow shoe 27, provided with transverse slots 27* is adjustably, set

upon a skeleton frame arm 22, provided with longitudinal slots 27*, by means of 1v bolts and nuts 25. In this way the action of the supplementary cam can be regulated by adjusting the shoe to contact more or. less with the collar l.

Shaft 8 is provided with angular shanks 11 having slots for locking pins, or other means to hold on either end a hand wheel 11, (shown dotted in Fig. 3) or a gear wheel orpulley, tor other driving means. The shaft 8 rotates in suitable bearings 5 located in the sides of the casingQ, these hearings being provided with means for longitudinal adjustment on the casing to secure SiltlS'. factory working of the cams.

A spiral spring 15 incloses a portion of the rod 1, one end of which bears against a washer 16 backed by an abutment part1- tion 17 secured to the casing 2. The other end is adjustably held by a ratchet wheel end of the rod 1 which can be adjusted to vary the length of the drill stroke. Between said nuts and the. top 21 of the casing 2 is provided an elastic buffer or cushioning member 20 (shown reduced in size in drawings) for the purpose of reducing the jar caused by concussion in the top of the casing. I

An elongated check pawl 23 (see Figs. 3 and l) is provided to continuously engage the ratchet wheel 13, a leaf spring 24- being provided to bear against the said pawl to prevent backward movement of the said ratchet wheel. This pawl :23 is necessarily long because of the reciprocation longitudinally of the rod 1 upon which the disk is mounted.

The casing 2 and its outer guide casing are protected from dust by removable shield plates31, (shown dotted in Figs. 1 and 6), which also allow the cams to move freely within.

For the purpose of lowering the drill to strike new rock or other material, there is provided a feed screw 34 provided with a hand wheel 35. This screw is controlled by a fixed nut 37 mounted in the end 39 of the outer casing 80 and rotates in a bushing 36 in the top 2101? the casing 2. An aperture 18 i s'provided in the lower half of the end 39 through which the end 19 of the rod 1 reciprocate's.

The clamping frame 40 is provided with a screw 42 (Fig. 4) passing through to cheeks 40? of the frame, for the purpose of allowing the same to be tightened or made loose on the casing 2 at will. The frame is pivoted at 12 to a clamp 414 so that the drill can hemmed in any direction desired. The clamp has cheeks adapted to be pinched together for securing this clamp to a pillar support by means of a locking screw 50. The connecting means 28 between the rod 1 and the drill may be of any suitable kind.

The operation of this device will be clear from the foregoing, but it may be summarized as follows :When the shaft 8 is caused to rotate the long surfaces of the cams 6 wipethe collar 4, causing the drill to reciprocate and also to rotate. The latter part of the rotating action is intermittently stopped by the action of the cams 7, the surfaces of which are so arranged to bear against the collar less continuously than the cams 6. This action canbe regulated by employing the supplementary cams, provided with adjustable shoes, hereinbefore described. It is obvious that when a main cam and a supplementary cam are each bearing. evenly on the collar then there will be no rotation of the latter. During the up ward movement of the rod 1 the spring .15 is compressed and the ratchet disk 13 is rotated, the 23,11oldin'g the same from backward movement. When the collar 4 is free from the cams the spring 15 is allowed to expand, the ratchet disk slidingalong the pawl, and the rod is forced outwardly. The opposite cam arm then catches the col lar and starts the arm again on its upward stroke. The pawl 23 acts as a check against any tendency of the spring 15 to cause the intermittent rotation of the rod 1 to become irregular. It is obvious that should any such irregularity occur, the drill would lose a great deal of its'efficiency as the blows would not-be delivered in the best positions. When the drill end no longer finds n ew'rock or other material to strike at the outer end of its stroke, adjustment of the casing 52 is necessary. This is accomplished by turning the hand wheel 35, and operating the feed screw 34 thus-lowering the'drilling apparatus asdesir'ed.

It is obvious that those skilled in the art may vary the details of construction and arrangement of parts, without departing from the spirit of my invention, and therefore I do not wish to be limited to such features except as may be required bythe claims.

1. In a drill, the combination with a Gas ing, of a drill mounted in said casing adapted to be reciprocated and intermittently rotated, a transverse shaft mounted insaid casing adapted to be rotated, a collar adj u'stably mounted on'said drill rod, two pairs of oppositely disposed cam arms mounted on said transverse shaft, and to either side of said drill rod adapted to wipe said collar, one pair of said camarms; being pro 100 vided with longitudinal slots, shoes mounted on said second named pair of cam arms provided with transverse slots registering with said slots in said: cam arms, and adjustable means securing said cam arms to said shoes 105 through said slots, providing longitudinal and transverse adjustment of said shoes to regulate the wipingsurface of said second named pairs of cam arms, substantially as described.

2. In a drill, the combination with 'a casing of a drill rod mounted in said casing adapted to be reciprocated and intermittently rotated, a transverse shaft mounted in said shaft adapted to be rotated, a collaradjust- 115 ably mounted on said drill rod, twopairsof if oppositely disposed cam arms mounted on said transverse shaft and to either side, of said drill rod adapted to wipe said collar, one pair of said cam arms being provided 12 with longitudinal slots, shoes mounted on said second named pair of 'cain arms pro vided with transverse slots registering with said slots in said cam arms, and adjustable means securing said shoes to said arms 125 through said slots, providing fo1'-'longitudinal and transverse adjustment of said shoes, to regulate the wiping surface of said second-named pair of cam arms, an adjustable ratchet wheel mounted on said drill rod, an 130 abutting plate mounted in said casingprovided with an aperture, through which said drill rod reciprocates, a spring mounted on said drill rod between said adjustable ratchet wheel and said abutting plate, an elongated hinged pawl adapted to engage along its upper edge the teeth of said ratchet wheel to hold said ratchet wheel against backward movement, and a springmounted in said casing and engaging said pawl to 11 hold the same in engagement with said; ratchet wheel, substantially as described.

In witness whereof I have hereunto set my in the presence of two witnesses.

THOMAS ALBERT SONE. Witnesses:

EDNA TURRI, WILLIAM L. BEATTIE.

Copies of this patent may be obtained for live cents each, by addressing the Commissioner of Patents Washington, D. 0 

